Surface Properties and Selenate Adsorption of Hydroxyiron-Vermiculite Complexes

Shi Yong Wei

doi:10.4028/www.scientific.net/AMR.482-484.1201

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 482-484Surface Properties and Selenate Adsorption of...

Surface Properties and Selenate Adsorption of Hydroxyiron-Vermiculite Complexes

Abstract:

Hydroxyiron-vermiculite complexes (Fe-Vermiculite) were prepared and identified using X-ray diffraction (XRD). The surface properties and selenate adsorption characteristics of Fe-Vermiculite were investigated. The specific surface area, surface fractal dimension D value and the pH value of the point of zero charge (pHPZC) of vermiculite were 287.19 m2/g, 2.14, and 2.87, respectively, and those of Fe-Vermiculite were 312.48 m2/g, 2.59, and 5.74, respectively. At pH 5.5, the maximum adsorption capacities (qmax) for selenate of vermiculite and Fe-Vermiculite were 4.36 and 9.12 mg/g, respectively. Langmuir isotherm was very suitable for describing the selenate adsorption of vermiculite (R2 =0.993), and Freundlich isotherm could fit the adsorption data for selenate by Fe-Vermiculite (R2 =0.981).

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Advanced Materials Research (Volumes 482-484)

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1201-1204

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https://doi.org/10.4028/www.scientific.net/AMR.482-484.1201

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February 2012

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Shi Yong Wei

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Adsorption, Hydroxyiron-Vermiculite Complexes, Selenate, Surface Properties

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